error: Use error_report_err() where appropriate (again)

Same Coccinelle semantic patch as in commit 565f65d.

We now use the original error whole instead of just its message
obtained with error_get_pretty().  This avoids suppressing its hint
(see commit 50b7b00), but I don't think the errors touched in this
commit can come with hints.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <1450452927-8346-3-git-send-email-armbru@redhat.com>
diff --git a/hw/ppc/spapr_drc.c b/hw/ppc/spapr_drc.c
index 8be62c3..4fb86a6 100644
--- a/hw/ppc/spapr_drc.c
+++ b/hw/ppc/spapr_drc.c
@@ -465,8 +465,7 @@
     object_property_add_alias(root_container, link_name,
                               drc->owner, child_name, &err);
     if (err) {
-        error_report("%s", error_get_pretty(err));
-        error_free(err);
+        error_report_err(err);
         object_unref(OBJECT(drc));
     }
     g_free(child_name);
@@ -486,8 +485,7 @@
     snprintf(name, sizeof(name), "%x", drck->get_index(drc));
     object_property_del(root_container, name, &err);
     if (err) {
-        error_report("%s", error_get_pretty(err));
-        error_free(err);
+        error_report_err(err);
         object_unref(OBJECT(drc));
     }
 }